Practical Luthier Tool: Donner guitar neck rest supports various string instruments, such as acoustic guitar, electric guitar, bass, etc. Very handy for changing strings, cleaning, repairing, mechanical maintenance, etc | Protecting Guitar Neck: Made of environmental friendly cork, Donner guitar neck rest directly contacts with various painted guitar without scratching guitar neck or harming human skin. | Adjustable Heights: With 2 different heights and 6 CM opening width, it offer 2 options to support different musical instruments in different position so it fit many instrument, such as classical guitar, mandolin, ukulele, banjo, etc. | Polishing Treatment: Donner guitar neck cradle’s surface has been polished many times without hurting your hands. | High Density Cork: Donner guitar neck support is lightweight, durable and provides a stable cushioned cradle, not easy to slide when work on guitar. Weight: 226.5 g.